Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2020		11,728,212
Beginning balance at Dec. 31, 2020	$ 329,334	$ 117	$ 97,090	$ 241,727	$ (9,600)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	135,536			135,536
Other comprehensive income (loss), net of tax	2,567				2,567
Employee stock purchase plan (in shares)		56,524
Employee stock purchase plan	2,904	$ 1	2,903
Stock options exercised (in shares)		48,769
Stock options exercised	1,733	$ 1	1,732
Stock repurchased related to the exercise of stock options and stock awards vested (in shares)		(155,653)
Stock repurchased related to the exercise of stock options and stock awards vested	(8,684)	$ (2)	(8,682)
Stock awards vested (in shares)		247,235
Stock awards vested	0	$ 2	(2)
Stock-based compensation	11,212		11,212
Ending balance (in shares) at Dec. 31, 2021		11,925,087
Ending balance at Dec. 31, 2021	474,602	$ 119	104,253	377,263	(7,033)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	28,789			28,789
Other comprehensive income (loss), net of tax	14,778				14,778
Employee stock purchase plan (in shares)		59,693
Employee stock purchase plan	2,231	$ 1	2,230
Stock options exercised (in shares)		109,186
Stock options exercised	3,475	$ 1	3,474
Stock repurchased related to the exercise of stock options and stock awards vested (in shares)		(151,213)
Stock repurchased related to the exercise of stock options and stock awards vested	(7,459)	$ (2)	(7,457)
Stock awards vested (in shares)		163,532
Stock awards vested	0	$ 2	(2)
Stock-based compensation	$ 9,544		9,544
Ending balance (in shares) at Dec. 31, 2022	12,106,285	12,106,285
Ending balance at Dec. 31, 2022	$ 525,960	$ 121	112,042	406,052	7,745
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	15,928			15,928
Other comprehensive income (loss), net of tax	26				26
Issuance of common stock in public offering, net of issuance costs (in shares)		2,300,000
Issuance of common stock in public offering, net of issuance costs	85,107	$ 23	85,084
Employee stock purchase plan (in shares)		52,211
Employee stock purchase plan	$ 2,542	$ 1	2,541
Stock options exercised (in shares)	49,450	49,450
Stock options exercised	$ 1,564		1,564
Stock repurchased related to the exercise of stock options and stock awards vested (in shares)		(138,929)
Stock repurchased related to the exercise of stock options and stock awards vested	(7,381)	$ (1)	(7,380)
Stock awards vested (in shares)		231,749
Stock awards vested	0	$ 2	(2)
Stock-based compensation	$ 12,348		12,348
Ending balance (in shares) at Dec. 31, 2023	14,600,766	14,600,766
Ending balance at Dec. 31, 2023	$ 636,094	$ 146	$ 206,197	$ 421,980	$ 7,771